@font-face {
  font-family: "Gotham Book Web";
  src: url("assets/fonts/Gotham-Book.otf") format("opentype");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Gotham Medium Web";
  src: url("assets/fonts/Gotham-Medium.otf") format("opentype");
  font-style: normal;
  font-weight: 500;
  font-display: swap;
}

@font-face {
  font-family: "Gotham Medium Web";
  src: url("assets/fonts/Gotham-Medium.otf") format("opentype");
  font-style: normal;
  font-weight: 600;
  font-display: swap;
}

:root {
  --ink: #0d0d0f;
  --muted: #68686d;
  --line: #dedee2;
  --paper: #ffffff;
  --soft: #f5f5f7;
  --visual: #d9d9de;
  --visual-deep: #929297;
  --accent: #7d171d;
  --dark: #111112;
  --font-system: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-book: "Gotham Book Web", var(--font-system);
  --font-medium: "Gotham Medium Web", var(--font-system);
  --font-mixed: "Gotham Book Web", var(--font-system);
  --hero-title-en-size: 71.334px;
  --hero-title-en-line: 77.527px;
  --hero-title-en-spacing: -5.487px;
  --hero-title-cn-size: 65px;
  --hero-title-cn-line: 70.643px;
  --hero-title-cn-spacing: -4.103px;
  --hero-eyebrow-size: 8px;
  --hero-eyebrow-line: 11.287px;
  --hero-lead-size: 15.742px;
  --hero-lead-line: 22.488px;
  --hero-lead-spacing: -0.555px;
  --hero-copy-size: 12px;
  --hero-copy-line: 18px;
  --hero-pad-top: 20.5px;
  --hero-pad-left: 30px;
  --hero-pad-right: 21px;
  --section-title-size: 36px;
  --peer-heading-left: min(10.6666667vw, 68.267px);
  --copy-right-safe: min(10vw, 64px);
  --connection-card-left: min(9.8666667vw, 63.147px);
  --connection-copy-inset: min(5.1333333vw, 32.853px);
  --site-header-height: calc(12.2666667vw + env(safe-area-inset-top));
  --story-page-height: calc(100vh - var(--site-header-height));
  --story-hold-distance: clamp(105px, 13vh, 135px);
  --story-transition-distance: clamp(420px, 68vh, 700px);
  --story-final-hold: 0px;
  color-scheme: light;
  font-family: var(--font-book);
  font-weight: 400;
  font-synthesis: none;
  letter-spacing: 0;
  scroll-behavior: smooth;
}

html.story-snap-running {
  scroll-behavior: auto;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--paper);
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button,
input,
textarea,
select {
  font-family: inherit;
}

h1,
h2,
h3,
strong,
.back-to-top {
  font-family: var(--font-medium);
  font-weight: 600;
}

a {
  color: inherit;
}

img {
  display: block;
  max-width: 100%;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 100;
  padding: 10px 14px;
  color: #fff;
  background: var(--ink);
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  min-height: 0;
  padding: calc(4vw + env(safe-area-inset-top)) 0 4vw 8vw;
  border-bottom: 1px solid rgba(13, 13, 15, 0.07);
  background: rgba(247, 247, 248, 0.94);
  backdrop-filter: blur(18px);
}

.brand {
  display: block;
  text-decoration: none;
}

.brand img {
  width: auto;
  height: 4.2666667vw;
}

.header-cta {
  display: none;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 0 17px;
  border-radius: 999px;
  color: #fff;
  background: var(--accent);
  font-size: 12px;
  font-weight: 600;
  text-decoration: none;
}

.hero-actions,
.story-dots,
.desktop-break,
.desktop-title {
  display: none;
}

.mobile-title {
  display: inline;
  white-space: nowrap;
}

.section-inner,
.contact-card,
.site-footer {
  width: min(100%, 640px);
  margin-inline: auto;
}

.hero {
  overflow: hidden;
  background: var(--soft);
}

.hero .section-inner {
  padding: var(--hero-pad-top) var(--hero-pad-right) 0 var(--hero-pad-left);
}

.eyebrow,
.eyebrow-cn,
.card-kicker,
.section-count {
  margin: 0;
  text-transform: uppercase;
}

.eyebrow {
  color: var(--accent);
  font-size: 10px;
  font-family: var(--font-medium);
  font-weight: 600;
}

.eyebrow-cn {
  margin-top: 3px;
  color: var(--accent);
  font-size: 10px;
}

.eyebrow--dark {
  color: var(--ink);
}

.hero h1 {
  margin: 22px 0 14px;
  color: #111111;
  font-weight: 500;
  line-height: 1;
}

.hero h1 span {
  display: inline-block;
  white-space: nowrap;
}

.hero-title-en {
  font-family: var(--font-medium);
  font-size: var(--hero-title-en-size);
  font-weight: 500;
  line-height: var(--hero-title-en-line);
  letter-spacing: var(--hero-title-en-spacing);
  transform: translateX(max(-1.3333333vw, -8.533px));
}

.hero-title-cn {
  font-family: var(--font-system);
  font-size: var(--hero-title-cn-size);
  font-weight: 500;
  line-height: var(--hero-title-cn-line);
  letter-spacing: var(--hero-title-cn-spacing);
  transform: translateX(max(-0.2666667vw, -1.707px));
}

.hero .eyebrow,
.hero .eyebrow-cn {
  color: #630100;
  font-size: var(--hero-eyebrow-size);
  font-weight: 400;
  line-height: var(--hero-eyebrow-line);
}

.hero .eyebrow {
  font-family: var(--font-book);
}

.hero .eyebrow-cn {
  margin-top: 0;
  font-family: var(--font-system);
}

.hero-lead {
  margin: 0;
  color: #313135;
  font-family: var(--font-system);
  font-size: var(--hero-lead-size);
  font-weight: 600;
  line-height: var(--hero-lead-line);
  letter-spacing: var(--hero-lead-spacing);
}

.hero-copy,
.section-copy,
.agent-intro p,
.connection-note p {
  color: var(--muted);
  font-family: var(--font-mixed);
  font-size: 13px;
  line-height: 1.68;
}

.hero-copy {
  max-width: 510px;
  margin: 14px 0 0;
  color: #6e6e73;
  font-family: var(--font-mixed);
  font-size: var(--hero-copy-size);
  line-height: var(--hero-copy-line);
}

.hero-portrait {
  width: calc(100% + var(--hero-pad-left) + var(--hero-pad-right));
  max-width: none;
  margin: 20px calc(-1 * var(--hero-pad-right)) 0 calc(-1 * var(--hero-pad-left));
  opacity: 0;
  transform: scale(0.975);
  transform-origin: 50% 100%;
  animation: hero-portrait-reveal 1100ms cubic-bezier(0.22, 1, 0.36, 1) 500ms forwards;
}

.hero-portrait img {
  width: 100%;
}

@keyframes hero-portrait-reveal {
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.intelligence {
  overflow: hidden;
  padding: 62px 0 68px;
  background: var(--soft);
}

.intelligence .section-inner {
  padding: 0 var(--copy-right-safe) 0 var(--peer-heading-left);
}

.intelligence h2,
.story-section h2,
.agent-intro h2,
.connections h2,
.contact-card h2 {
  margin: 0;
  font-size: var(--section-title-size);
  font-weight: 600;
  line-height: 1.24;
}

.intelligence h2 {
  font-weight: 700;
}

.card-carousel {
  width: min(100%, 720px);
  margin: 26px auto 0;
}

.intelligence .card-carousel {
  width: 100%;
  margin-top: max(-1.7333333vw, -11.093px);
}

.carousel-track {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: min(78vw, 300px);
  gap: 14px;
  overflow-x: auto;
  padding: 0 max(24px, calc((100vw - 640px) / 2 + 24px)) 16px;
  scroll-padding-inline: max(24px, calc((100vw - 640px) / 2 + 24px));
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
}

.carousel-track::-webkit-scrollbar {
  display: none;
}

.connection-card {
  margin: 0;
  scroll-snap-align: start;
}

.intelligence .carousel-track {
  grid-auto-columns: min(76.1333333vw, 487.253px);
  gap: 0;
  padding: 0 min(5.0666667vw, 32.427px) 0 0;
  scroll-padding-inline: 0;
}

.intelligence-card {
  position: relative;
  width: min(94.9333333vw, 607.573px);
  margin: 0;
  scroll-snap-align: start;
}

.intelligence-card:last-child::after {
  position: absolute;
  top: 0;
  left: 100%;
  width: min(5.7333333vw, 36.693px);
  height: 1px;
  content: "";
}

.intelligence-card img {
  width: 100%;
  height: auto;
  transform: translateX(max(-0.6666667vw, -4.267px));
}

.carousel-dots {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 30px;
  margin-top: 10px;
}

.carousel-dots button {
  position: relative;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.carousel-dots button::before {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: #d4d4d8;
  content: "";
  transform: translate(-50%, -50%);
  transition: width 180ms ease, background 180ms ease;
}

.carousel-dots button.is-active::before {
  width: 24px;
  background: var(--ink);
}

.carousel-pill {
  width: min(32.5333333vw, 208.213px);
  min-height: 0;
  height: min(10.6666667vw, 68.267px);
  gap: 0;
  border-radius: 999px;
  background: #ebebef;
}

.carousel-pill button {
  width: min(6.4vw, 40.96px);
  height: 100%;
}

.carousel-pill button::before {
  width: min(2.1333333vw, 13.653px);
  height: min(2.1333333vw, 13.653px);
  background: #d4d4d8;
}

.carousel-pill button.is-active::before {
  width: min(7.4666667vw, 47.787px);
  background: #111112;
}

.intelligence .carousel-pill {
  margin: max(-8vw, -51.2px) auto 0;
}

.story-stack {
  position: relative;
  height: calc(
    var(--story-page-height) + var(--story-transition-distance) +
      var(--story-transition-distance) + var(--story-hold-distance) +
      var(--story-hold-distance) + var(--story-final-hold)
  );
  isolation: isolate;
  background: var(--paper);
}

.story-stage {
  position: sticky;
  top: var(--site-header-height);
  width: 100%;
  height: var(--story-page-height);
  overflow: hidden;
  background: var(--paper);
  touch-action: pan-y;
}

.story-stage.is-snap-active {
  touch-action: none;
}

.story-stage.is-snap-active.is-last-active,
.story-stage.is-natural-exit {
  touch-action: pan-y;
}

.story-section {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  padding: 0;
  background: var(--paper);
  will-change: transform;
}

.story-section:nth-child(1) {
  z-index: 1;
}

.story-section:nth-child(2) {
  z-index: 2;
  transform: translate3d(0, 100%, 0);
}

.story-section:nth-child(3) {
  z-index: 3;
  transform: translate3d(0, 100%, 0);
}

.story-section--tinted {
  background: var(--paper);
}

.story-section .section-inner {
  height: 100%;
  overflow: hidden;
  padding: min(4vw, 25.6px) 0 0;
  background: var(--paper);
}

.story-section:not(:first-child) {
  box-shadow: 0 -18px 44px rgba(18, 18, 20, 0.055);
}

.story-section h2 {
  width: min(82vw, 524.8px);
  margin-left: min(8vw, 51.2px);
  color: #111111;
  font-family: var(--font-system);
  font-size: min(9.3333333vw, 59.733px);
  font-weight: 700;
  line-height: min(12vw, 76.8px);
  letter-spacing: max(-0.7873333vw, -5.039px);
}

.section-count {
  width: min(82vw, 524.8px);
  margin-left: min(8vw, 51.2px);
  margin-bottom: min(2.6666667vw, 17.067px);
  color: #8a8a90;
  font-size: min(2.6666667vw, 17.067px);
  line-height: min(4vw, 25.6px);
}

.section-lead {
  width: min(82vw, 524.8px);
  margin: min(4vw, 25.6px) 0 0 min(8vw, 51.2px);
  color: #111111;
  font-family: var(--font-mixed);
  font-size: min(3.4666667vw, 22.187px);
  font-weight: 500;
  line-height: min(4.1333333vw, 26.453px);
  letter-spacing: 0;
}

.section-copy {
  width: min(80.6666667vw, 516.267px);
  margin: min(2.6666667vw, 17.067px) 0 min(6.4vw, 40.96px) min(8vw, 51.2px);
  color: #66666b;
  font-family: var(--font-mixed);
  font-size: min(2.6666667vw, 17.067px);
  font-weight: 400;
  line-height: min(4vw, 25.6px);
  letter-spacing: 0;
}

.feature-visual {
  position: relative;
  width: min(82.6666667vw, 529.067px);
  margin: 0 auto;
  transform: scale(var(--story-visual-scale, 1));
  transform-origin: top center;
}

.feature-interface {
  position: relative;
  z-index: 1;
  width: 100%;
  filter: drop-shadow(
    0 min(4.5613333vw, 29.192px) min(11.404vw, 72.986px) rgba(18, 18, 20, 0.08)
  );
}

.feature-character {
  position: absolute;
  z-index: 2;
  bottom: 0;
  left: 0;
  width: 100%;
  height: auto;
}

.agent-intro {
  padding: min(18.6666667vw, 119.467px) 0;
  background: var(--paper);
}

.agent-intro .section-inner {
  padding: 0;
}

.agent-intro .eyebrow {
  width: min(74vw, 473.6px);
  margin: 0 0 0 var(--peer-heading-left);
  color: #1c0101;
  font-family: var(--font-medium);
  font-size: min(2.4vw, 15.36px);
  font-weight: 500;
  line-height: 1;
  letter-spacing: 0;
}

.agent-intro h2 {
  width: calc(100% - var(--peer-heading-left) - var(--copy-right-safe));
  margin: min(1.3333333vw, 8.533px) 0 0 var(--peer-heading-left);
  color: #111111;
  font-family: var(--font-system);
  font-size: min(8.5333333vw, 54.613px);
  font-weight: 700;
  line-height: min(10.6666667vw, 68.267px);
  letter-spacing: max(-0.72vw, -4.608px);
}

.agent-intro p:last-child {
  width: min(74vw, 473.6px);
  margin: min(5.3333333vw, 34.133px) 0 0 var(--peer-heading-left);
  color: #111111;
  font-family: var(--font-mixed);
  font-size: min(3.4666667vw, 22.187px);
  font-weight: 400;
  line-height: min(4.8vw, 30.72px);
  letter-spacing: 0;
}

.engine {
  position: relative;
  width: 100%;
  height: 141.0666667vw;
  overflow: hidden;
  color: #fff;
  background: #1a1a1a;
}

.engine-video {
  position: absolute;
  z-index: 0;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.2;
}

.engine-scroll {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  overscroll-behavior-inline: contain;
  scrollbar-width: none;
  touch-action: pan-x pan-y;
  -webkit-overflow-scrolling: touch;
}

.engine-scroll::-webkit-scrollbar {
  display: none;
}

.engine-scroll:focus-visible {
  outline: 2px solid rgba(255, 255, 255, 0.85);
  outline-offset: -2px;
}

.engine-architecture {
  display: block;
  width: auto;
  max-width: none;
  height: 100%;
  user-select: none;
  -webkit-user-drag: none;
}

.connections {
  overflow: hidden;
  padding: min(18.6666667vw, 119.467px) 0 min(13.3333333vw, 85.333px);
  background: #f8f8f9;
}

.connections .section-inner {
  padding: 0;
}

.connections .eyebrow {
  width: min(74vw, 473.6px);
  margin: 0 0 0 var(--peer-heading-left);
  color: #1c0101;
  font-family: var(--font-medium);
  font-size: min(2.4vw, 15.36px);
  font-weight: 500;
  line-height: 1;
  letter-spacing: 0;
}

.connections h2 {
  width: min(74vw, 473.6px);
  margin: min(1.3333333vw, 8.533px) 0 0 var(--peer-heading-left);
  color: #111111;
  font-family: var(--font-system);
  font-size: min(9.3333333vw, 59.733px);
  font-weight: 700;
  line-height: min(12vw, 76.8px);
  letter-spacing: max(-0.7873333vw, -5.039px);
}

.connection-carousel {
  width: 100%;
  margin-top: min(4.8vw, 30.72px);
}

.connection-carousel .carousel-track {
  grid-auto-columns: max-content;
  gap: min(4vw, 25.6px);
  padding: 0 var(--connection-card-left);
  scroll-padding-inline: var(--connection-card-left);
}

.connection-card {
  position: relative;
  height: min(76.9333333vw, 492.373px);
  filter: drop-shadow(
    0 min(4.5613333vw, 29.192px) min(11.404vw, 72.986px) rgba(18, 18, 20, 0.08)
  );
}

.connection-card:nth-child(1) {
  width: min(59.5vw, 380.8px);
}

.connection-card:nth-child(2) {
  width: min(59.3vw, 379.52px);
}

.connection-card:nth-child(3) {
  width: min(59.0666667vw, 378.027px);
}

.connection-card:nth-child(4) {
  width: min(61.7vw, 394.88px);
}

.connection-card-crop {
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.connection-card img {
  width: 100%;
  height: auto;
}

.connections .carousel-pill {
  margin: min(6.1333333vw, 39.253px) auto 0;
}

.connection-note {
  width: min(70.6666667vw, 452.267px);
  margin: min(10.6666667vw, 68.267px) 0 0
    calc(var(--connection-card-left) + var(--connection-copy-inset));
}

.connection-note h3 {
  margin: 0;
  color: #111111;
  font-family: var(--font-mixed);
  font-size: min(3.4666667vw, 22.187px);
  font-weight: 500;
  line-height: min(4.1333333vw, 26.453px);
  letter-spacing: 0;
}

.connection-note p {
  margin: min(2.6666667vw, 17.067px) 0 0;
  color: #66666b;
  font-family: var(--font-mixed);
  font-size: min(2.6666667vw, 17.067px);
  font-weight: 400;
  line-height: min(4vw, 25.6px);
  letter-spacing: 0;
}

.closing-stack {
  position: relative;
  background: #f0f0f2;
}

.contact-section {
  padding: min(17.3333333vw, 110.933px) min(4.8vw, 30.72px) 0;
  background: #f0f0f2;
}

.contact-card {
  min-height: min(146.6666667vw, 938.667px);
  padding: min(13.3333333vw, 85.333px) min(10vw, 64px) 0;
  border-radius: min(6.4vw, 40.96px) min(6.4vw, 40.96px) 0 0;
  background: #fff;
}

.contact-card .eyebrow {
  margin: 0;
  color: #1c0101;
  font-family: var(--font-medium);
  font-size: min(2.4vw, 15.36px);
  font-weight: 500;
  line-height: 1;
  letter-spacing: 0;
}

.contact-card h2 {
  width: 100%;
  margin: min(3.2vw, 20.48px) 0 0;
  color: #111111;
  font-family: var(--font-system);
  font-size: min(9.3333333vw, 59.733px);
  font-weight: 700;
  line-height: min(12vw, 76.8px);
  letter-spacing: max(-0.7873333vw, -5.039px);
}

.contact-card .contact-copy {
  margin: min(12.5vw, 80px) 0 0;
  color: #66666b;
  font-family: var(--font-mixed);
  font-size: min(2.6666667vw, 17.067px);
  font-weight: 400;
  line-height: min(4vw, 25.6px);
  letter-spacing: 0;
  white-space: nowrap;
}

.contact-card .contact-copy--medium {
  margin-top: min(16vw, 102.4px);
  color: #1c0101;
  font-family: var(--font-medium);
  font-weight: 500;
}

.contact-card .contact-copy--medium a {
  color: var(--accent);
  font: inherit;
  text-decoration: none;
}

.back-to-top {
  display: flex;
  align-items: center;
  justify-content: center;
  width: min(19.0666667vw, 122.027px);
  min-height: min(7.6vw, 48.64px);
  margin: min(14.6666667vw, 93.867px) auto 0;
  padding: 0;
  border: 0;
  border-radius: 999px;
  color: #fff;
  background: var(--ink);
  font: inherit;
  font-size: 12px;
  cursor: pointer;
}

.site-footer-dock {
  position: sticky;
  z-index: 40;
  bottom: 0;
  width: 100%;
  padding: 0;
  background: #fff;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  width: min(100%, 640px);
  min-height: min(9.6vw, 61.44px);
  margin-inline: auto;
  padding: 0 24px;
  color: #8b8b90;
  background: #fff;
  background-image: none;
  font-family: var(--font-book);
  font-size: min(2.2666667vw, 14.507px);
  line-height: 1;
  white-space: nowrap;
  border: 0;
  box-shadow: none;
}

.site-footer__symbol,
.site-footer__year,
.site-footer__brand {
  display: inline-block;
}

.site-footer__symbol {
  margin-right: 0.28em;
}

.site-footer__year {
  margin-right: 0.35em;
}

@media (min-width: 641px) {
  :root {
    --hero-title-en-size: 88px;
    --hero-title-en-line: 95.6px;
    --hero-title-en-spacing: -6.77px;
    --hero-title-cn-size: 80px;
    --hero-title-cn-line: 86.9px;
    --hero-title-cn-spacing: -5.05px;
    --hero-eyebrow-size: 10px;
    --hero-eyebrow-line: 14.1px;
    --hero-lead-size: 19.4px;
    --hero-lead-line: 27.7px;
    --hero-lead-spacing: -0.68px;
    --hero-copy-size: 14.8px;
    --hero-copy-line: 22.2px;
    --hero-pad-top: 27px;
    --hero-pad-left: 40px;
    --hero-pad-right: 28px;
    --section-title-size: 42px;
  }

  .carousel-track {
    grid-auto-columns: 300px;
    padding-inline: calc((100vw - 640px) / 2 + 32px);
    scroll-padding-inline: calc((100vw - 640px) / 2 + 32px);
  }
}

@supports (height: 100svh) {
  :root {
    --story-page-height: calc(100svh - var(--site-header-height));
    --story-hold-distance: clamp(105px, 13svh, 135px);
    --story-transition-distance: clamp(420px, 68svh, 700px);
  }
}

@media (max-width: 359px) {
  :root {
    --hero-title-en-size: 60.87px;
    --hero-title-en-line: 66.16px;
    --hero-title-en-spacing: -4.68px;
    --hero-title-cn-size: 55.47px;
    --hero-title-cn-line: 60.28px;
    --hero-title-cn-spacing: -3.5px;
    --hero-eyebrow-size: 7px;
    --hero-eyebrow-line: 9.63px;
    --hero-lead-size: 13.43px;
    --hero-lead-line: 19.19px;
    --hero-lead-spacing: -0.47px;
    --hero-copy-size: 11px;
    --hero-copy-line: 16px;
    --hero-pad-top: 17.5px;
    --hero-pad-left: 25.6px;
    --hero-pad-right: 17.9px;
    --section-title-size: 31px;
  }

}

@media (min-width: 360px) and (max-width: 374px) {
  :root {
    --hero-title-en-size: 68.48px;
    --hero-title-en-line: 74.43px;
    --hero-title-en-spacing: -5.27px;
    --hero-title-cn-size: 62.4px;
    --hero-title-cn-line: 67.82px;
    --hero-title-cn-spacing: -3.94px;
    --hero-eyebrow-size: 7.7px;
    --hero-eyebrow-line: 10.84px;
    --hero-lead-size: 15.1px;
    --hero-lead-line: 21.59px;
    --hero-lead-spacing: -0.53px;
    --hero-copy-size: 11.5px;
    --hero-copy-line: 17.28px;
    --hero-pad-top: 19.7px;
    --hero-pad-left: 28.8px;
    --hero-pad-right: 20.2px;
    --section-title-size: 35px;
  }
}

@media (min-width: 390px) and (max-width: 413px) {
  :root {
    --hero-title-en-size: 74.19px;
    --hero-title-en-line: 80.63px;
    --hero-title-en-spacing: -5.71px;
    --hero-title-cn-size: 67.6px;
    --hero-title-cn-line: 73.47px;
    --hero-title-cn-spacing: -4.27px;
    --hero-eyebrow-size: 8.3px;
    --hero-eyebrow-line: 11.74px;
    --hero-lead-size: 16.37px;
    --hero-lead-line: 23.39px;
    --hero-lead-spacing: -0.58px;
    --hero-copy-size: 12.5px;
    --hero-copy-line: 18.72px;
    --hero-pad-top: 21.3px;
    --hero-pad-left: 31.2px;
    --hero-pad-right: 21.8px;
    --section-title-size: 37px;
  }
}

@media (min-width: 414px) and (max-width: 429px) {
  :root {
    --hero-title-en-size: 78.75px;
    --hero-title-en-line: 85.59px;
    --hero-title-en-spacing: -6.06px;
    --hero-title-cn-size: 71.76px;
    --hero-title-cn-line: 77.98px;
    --hero-title-cn-spacing: -4.53px;
    --hero-eyebrow-size: 8.8px;
    --hero-eyebrow-line: 12.46px;
    --hero-lead-size: 17.38px;
    --hero-lead-line: 24.83px;
    --hero-lead-spacing: -0.61px;
    --hero-copy-size: 13.25px;
    --hero-copy-line: 19.87px;
    --hero-pad-top: 22.6px;
    --hero-pad-left: 33.1px;
    --hero-pad-right: 23.2px;
    --section-title-size: 40px;
  }
}

@media (min-width: 430px) and (max-width: 640px) {
  :root {
    --hero-title-en-size: 81.8px;
    --hero-title-en-line: 88.9px;
    --hero-title-en-spacing: -6.29px;
    --hero-title-cn-size: 74.53px;
    --hero-title-cn-line: 81px;
    --hero-title-cn-spacing: -4.71px;
    --hero-eyebrow-size: 9.2px;
    --hero-eyebrow-line: 12.94px;
    --hero-lead-size: 18.05px;
    --hero-lead-line: 25.79px;
    --hero-lead-spacing: -0.64px;
    --hero-copy-size: 13.75px;
    --hero-copy-line: 20.64px;
    --hero-pad-top: 23.5px;
    --hero-pad-left: 34.4px;
    --hero-pad-right: 24.1px;
    --section-title-size: 41px;
  }
}

@media (min-width: 1024px) {
  :root {
    --desktop-shell: min(calc(100vw - 80px), 960px);
    --site-header-height: 44px;
    --story-page-height: calc(100vh - var(--site-header-height));
    --story-hold-distance: clamp(90px, 10vh, 120px);
    --story-transition-distance: clamp(480px, 60vh, 680px);
  }

  .site-header {
    min-height: 44px;
    padding: 0 max(40px, calc((100vw - 960px) / 2));
    justify-content: space-between;
    background: rgba(247, 247, 248, 0.96);
  }

  .brand img {
    height: 17px;
  }

  .header-cta {
    display: inline-flex;
    min-height: 28px;
    padding: 0 18px;
    font-family: var(--font-system);
    font-size: 12px;
    font-weight: 500;
  }

  .section-inner,
  .site-footer {
    width: var(--desktop-shell);
    max-width: 960px;
  }

  .hero {
    min-height: calc(100vh - var(--site-header-height));
    background: #fff;
  }

  .hero .section-inner {
    position: relative;
    height: calc(100vh - var(--site-header-height));
    min-height: 700px;
    padding: clamp(112px, 14vh, 138px) 0 0;
  }

  .hero .eyebrow,
  .hero .eyebrow-cn {
    position: relative;
    z-index: 2;
    width: 52%;
    font-size: 15px;
    line-height: 1.35;
  }

  .hero h1 {
    position: relative;
    z-index: 2;
    width: 55%;
    margin: 36px 0 48px;
  }

  .hero-title-en {
    font-size: clamp(88px, 6.7vw, 100px);
    line-height: 0.98;
    letter-spacing: -5.8px;
    transform: translateX(-5px);
  }

  .hero-title-cn {
    font-size: clamp(78px, 5.8vw, 88px);
    line-height: 1.05;
    letter-spacing: -4.2px;
    transform: none;
  }

  .hero-lead,
  .hero-copy,
  .hero-actions {
    position: relative;
    z-index: 2;
    width: 54%;
  }

  .hero-lead {
    font-size: clamp(20px, 1.55vw, 23px);
    line-height: 1.35;
    letter-spacing: -0.7px;
  }

  .hero-copy {
    max-width: 560px;
    margin-top: 20px;
    font-size: clamp(14px, 1.05vw, 16px);
    line-height: 1.62;
  }

  .hero-actions {
    display: flex;
    gap: 14px;
    margin-top: 38px;
  }

  .hero-action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 40px;
    padding: 0 20px;
    border: 1px solid #cfd0d4;
    border-radius: 999px;
    font-family: var(--font-system);
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
  }

  .hero-action--primary {
    border-color: var(--accent);
    color: #fff;
    background: var(--accent);
  }

  .hero-action--secondary {
    color: #222226;
    background: rgba(255, 255, 255, 0.72);
  }

  .hero-portrait {
    position: absolute;
    z-index: 1;
    right: -82px;
    bottom: 0;
    width: min(67%, 640px);
    max-width: none;
    margin: 0;
    transform-origin: 50% 100%;
  }

  .intelligence {
    display: flex;
    flex-direction: column;
    height: calc(100vh - var(--site-header-height));
    min-height: 0;
    padding: clamp(78px, 9vh, 96px) 0 62px;
  }

  .intelligence .section-inner {
    padding: 0;
  }

  .intelligence h2 {
    font-size: clamp(58px, 4.7vw, 70px);
    line-height: 1.08;
    letter-spacing: -4px;
    white-space: nowrap;
  }

  .intelligence h2 br {
    display: none;
  }

  .intelligence .card-carousel {
    flex: 0 0 auto;
    width: auto;
    height: min(29.375vw, 564px);
    margin: 44px auto 0;
  }

  .intelligence .carousel-track {
    display: flex;
    align-items: stretch;
    justify-content: center;
    height: 100%;
    gap: clamp(14px, 1.0416667vw, 20px);
    overflow: visible;
    padding: 0;
  }

  .intelligence-card {
    flex: 0 0 auto;
    width: auto;
    height: 100%;
    aspect-ratio: 380 / 564;
  }

  .intelligence-card img {
    position: absolute;
    top: -6.443%;
    left: -15.887%;
    width: 131.774%;
    height: 121.443%;
    max-width: none;
    transform: none;
  }

  .intelligence-card:last-child::after,
  .intelligence .carousel-pill {
    display: none;
  }

  .story-section .section-inner {
    display: grid;
    grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
    grid-template-rows: auto auto auto auto auto;
    column-gap: clamp(52px, 4.5vw, 68px);
    align-content: center;
    height: 100%;
    overflow: hidden;
    padding: 54px 0;
  }

  .story-section .section-count,
  .story-section h2,
  .story-section .section-lead,
  .story-section .section-copy,
  .story-section .story-dots {
    grid-column: 1;
    width: 100%;
    margin-left: 0;
  }

  .story-section .section-count {
    grid-row: 1;
    margin-bottom: 28px;
    color: #9a9aa0;
    font-size: 15px;
    line-height: 1;
  }

  .story-section h2 {
    grid-row: 2;
    max-width: none;
    font-size: clamp(54px, 3.6vw, 60px);
    line-height: 1.28;
    letter-spacing: -3.4px;
  }

  .mobile-title {
    display: none;
  }

  .desktop-title {
    display: inline;
    white-space: nowrap;
  }

  .story-section .section-lead {
    grid-row: 3;
    margin-top: 42px;
    font-size: clamp(17px, 1.35vw, 20px);
    line-height: 1.45;
  }

  .story-section .section-copy {
    grid-row: 4;
    max-width: 570px;
    margin-top: 20px;
    margin-bottom: 0;
    font-size: clamp(14px, 1.08vw, 16px);
    line-height: 1.65;
  }

  .story-dots {
    grid-row: 5;
    display: flex;
    align-items: center;
    gap: 9px;
    margin-top: 36px;
  }

  .story-dots i {
    display: block;
    width: 8px;
    height: 8px;
    border-radius: 999px;
    background: #d7d7dc;
  }

  .story-section:nth-child(1) .story-dots i:nth-child(1),
  .story-section:nth-child(2) .story-dots i:nth-child(2),
  .story-section:nth-child(3) .story-dots i:nth-child(3) {
    width: 30px;
    background: #111112;
  }

  .story-section .feature-visual {
    grid-column: 2;
    grid-row: 1 / 6;
    align-self: center;
    justify-self: end;
    width: min(100%, calc(var(--story-page-height) * 0.58), 450px);
    margin: 0;
    transform: none;
  }

  .story-section:not(:first-child) {
    box-shadow: 0 -16px 48px rgba(18, 18, 20, 0.04);
  }

  .agent-intro {
    padding: 72px 0 70px;
    background: var(--soft);
  }

  .agent-intro .section-inner {
    padding: 0;
  }

  .agent-intro .eyebrow,
  .agent-intro h2,
  .agent-intro p:last-child {
    width: 100%;
    margin-left: 0;
  }

  .agent-intro .eyebrow {
    font-size: 16px;
  }

  .agent-intro h2 {
    max-width: 960px;
    margin-top: 16px;
    font-size: clamp(58px, 4.8vw, 72px);
    line-height: 1.18;
    letter-spacing: -4.8px;
  }

  .agent-intro p:last-child {
    max-width: 960px;
    margin-top: 34px;
    font-size: clamp(17px, 1.35vw, 20px);
    line-height: 1.5;
  }

  .engine {
    /* At 1920px: 1696x1058 artwork, with 112px on each side. */
    height: max(calc(100vh - var(--site-header-height)), 55.1041667vw);
    min-height: 720px;
  }

  .engine-scroll {
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    touch-action: auto;
  }

  .engine-architecture {
    width: 88.3333333%;
    height: auto;
    max-height: 100%;
    object-fit: contain;
  }

  .connections {
    min-height: calc(100vh - var(--site-header-height));
    padding: 72px 0 62px;
  }

  .connections .section-inner {
    padding: 0;
  }

  .connections .eyebrow,
  .connections h2 {
    width: 100%;
    margin-left: 0;
  }

  .connections .eyebrow {
    font-size: 16px;
  }

  .connections h2 {
    max-width: 960px;
    margin-top: 18px;
    font-size: clamp(58px, 4.8vw, 72px);
    line-height: 1.18;
    letter-spacing: -4.8px;
  }

  .desktop-break {
    display: inline;
  }

  .mobile-break {
    display: none;
  }

  .connection-carousel {
    width: var(--desktop-shell);
    max-width: 960px;
    margin: 48px auto 0;
  }

  .connection-carousel .carousel-track {
    display: grid;
    grid-auto-flow: initial;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    grid-auto-columns: auto;
    gap: 18px;
    overflow: visible;
    padding: 0;
  }

  .connection-card,
  .connection-card:nth-child(n) {
    width: auto;
    height: auto;
    filter: drop-shadow(0 18px 34px rgba(18, 18, 20, 0.06));
  }

  .connection-card-crop {
    height: auto;
    overflow: visible;
  }

  .connection-card img {
    width: 100%;
  }

  .connections .carousel-pill {
    display: none;
  }

  .connection-note {
    width: min(760px, 64vw);
    margin: 48px 0 0 calc((100vw - var(--desktop-shell)) / 2 + 32px);
  }

  .connection-note h3 {
    font-size: 21px;
    line-height: 1.4;
  }

  .connection-note p {
    margin-top: 12px;
    font-size: 17px;
    line-height: 1.6;
  }

  .contact-section {
    min-height: calc(100vh - var(--site-header-height));
    padding: 80px 40px 0;
  }

  .contact-card {
    width: min(calc(100vw - 160px), 1280px);
    max-width: 1280px;
    min-height: calc(100vh - var(--site-header-height) - 80px);
    margin-inline: auto;
    padding: 112px 140px 90px;
    border-radius: 42px 42px 0 0;
  }

  .contact-card .eyebrow {
    font-size: 16px;
  }

  .contact-card h2 {
    max-width: 1120px;
    margin-top: 38px;
    font-size: clamp(56px, 4.5vw, 72px);
    line-height: 1.2;
    letter-spacing: -4.2px;
  }

  .contact-card .contact-copy {
    margin-top: 62px;
    font-size: 17px;
    line-height: 1.6;
    white-space: normal;
  }

  .contact-card .contact-copy--medium {
    margin-top: 42px;
  }

  .back-to-top {
    width: 116px;
    min-height: 48px;
    margin: 62px 0 0;
    background: var(--accent);
    font-size: 14px;
  }

  .site-footer-dock {
    position: static;
  }

  .site-footer {
    min-height: 54px;
    font-size: 13px;
  }
}

@media (prefers-reduced-motion: reduce) {
  :root {
    scroll-behavior: auto;
  }

  .carousel-dots button::before {
    transition: none;
  }

  .hero-portrait {
    opacity: 1;
    transform: none;
    animation: none;
  }
}